U-Boot scripts

Add U-Boot image header to script my_script.scr -> my_script.scr.uimg (requires mkimage on the host)

cd /path/to/{sd-card,tftp-root,usb-stick}/u-boot_scripts
./scr2uimg.sh stm32mp15/my_script.scr

Load in U-Boot shell

TFTP server

setenv autoload no
dhcp
setenv serverip 192.168.xxx.xxx
tftp ${scriptaddr} ${serverip}:u-boot_scripts/stm32mp15/my_script.scr.uimg

SD card

load mmc 0:4 ${scriptaddr} u-boot_scripts/stm32mp15/my_script.scr.uimg

USB stick

usb start
load usb 0 ${scriptaddr} u-boot_scripts/stm32mp15/my_script.scr.uimg

Run U-Boot script in shell

source ${scriptaddr}